Tubular package for blasting-cartridges



oooooooo TUBULAR PACKAGE FOR GGGGGGGGGGGGGGGGGG N. PETERS. Phnmmnngmpnef. wmmgwm n c .with the tube.

UNITED STATES PATENT OFFICE.

NATHAN H. HEFT, OF VALLEY, NEIV JERSEY, ASSIGNOR TO SAMUEL M. NASH, OE SORANTON, PENNSYLVANIA.

TUBULAR PACKAGE FOR BLASTIG-CARTRIDGES.

SPECIFICATION formingpart of Letters Patent No. 278,957, dated June 5, 1883. Application sled April i9, 1823. (No model.)

To all whom it may concern.-

Be it known that I, NATHAN H. HEFT, of Valley, in the colmty of Hunterdon and State of New Jersey, have invented a new and useful Improvement in Tubular Packages for Blasting-Cartridges, and I do hereby declare that the following is a full7 clear, and enact description of the same. 4'

My invention relates to the preparation o cartridges for blasting. Y

The practice of putting up powder in paper tubes has long been known among miners, and for many years was used only for wet blasting. For this the workmen cut the paper into strips of a length convenient to be wound upon a mandrel, and upon such mandrel the strip was pasted and lapped, forming a tube with a straight seam, the tube being subsequently filled with powder and then divided and used as required. This form of tube has also been made in long pieces or rolls from webs of pa per, which could be cut into lengths convenient for handling. Paper of manila-stock is the cheapest material which can be used, vand is well adapted to the purpose, with one eX- ception. In forming long pieces of tubing-from a continuous web, as must be, vwith a straight seam or lap, done in the practical manufacture, the iiber is necessarily brought to run This puts the main strength ofthe paper into the back, and renders it weak against any force exerted upon it' laterally. In consequence of this, when filled with powder, the tube is liable to split. this has been sought in making the tube of double thickness-that is, by putting one tube of paper within another. This increases eX- pense at the saine time that it doubles the strength, and does not change the direction of the fiber of the paper. The object of my invention is to avoid this liability to split, and

give the tube lateral as well as longitudinal resistance by changing the direction of the fiber ofthe paper.' This I accomplish by forming the tube of a .trip of paper cut longitudinally of the web or ber and wolmd spirally with overlapping and pasted edges. Ordinarily these tubes are made about two inches in d A remedy for l ameter. The strip of paper for my improved tube may be of any convenient width or length lnandrel. The paste .is applied to one edge and the paper wound upon the mandrel diagonally, so as to cause the edges properly to lap on the pasted portions. Any suitable means may be used to press the parts together to cause the laps to adhere iirmly, and as the formed portions Yof the tube pass off the mandrel they maybe dried in any suitable way.

. The accompanying drawing shows a portion of my improved tube. In this drawing the strip A is wound to overlap, as shown at a, the paste being applied on the lille of the overlap.

The tube may be made of practically double thickness by increasing the width of the overlapping portions-that is to say, by causing the fold to overlap half or more than half their width, and this may be done without any expense, except the increase in the amount of paper. Ordinarily, however, no suchl doubling of the thicknesses will be required. The diagonal direction ofthe strip causes the fiber to run around the tube, and this gives it equal resistance to lateral and longitudinal strain. Further, vas the direction ofthe lapping edges is also around the tube the double thickness also increases the lateral strength of the tube.

AfterV the tube is formed it may be waterproofed by means well known to the art. It is then cut up into suitable lengths and iilled with powder.

Having thus described my invention, what I claim is A tube of paper for cartridges, formed of a strip cut longitudinally of the web or fiber and wound spirally'with overlapping and pasted edges, as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

NATHAN H.- HEFT.

for handling or winding diagonally around the 

